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java.lang.UnsupportedClassVersionError: Bad version number in .class file?

...n I include an opensource library that I had to compile from source. Now, all the suggestions on the web indicate that the code was compiled in one version and executed in another version (new on old). However, I only have one version of JRE on my system. If I run the commands: ...
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Get push notification while App in foreground iOS

... app received push notifications in foreground func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) { completionHandler([.alert, .badge, .sound...
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Very simple log4j2 XML configuration file using Console and File appender

...n" /> </Console> <File name="MyFile" fileName="all.log" immediateFlush="false" append="false"> <PatternLayout pattern="%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/> </File> </Appenders> <Loggers> ...
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Split Strings into words with multiple word boundary delimiters

...ied: import re DATA = "Hey, you - what are you doing here!?" print re.findall(r"[\w']+", DATA) # Prints ['Hey', 'you', 'what', 'are', 'you', 'doing', 'here'] share | improve this answer |...
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What is the best way to check for Internet connectivity using .NET?

...google.com does not return some HTML :) – Daniel Vassallo Jan 9 '10 at 1:01 3 @Daniel: true on th...
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How to select bottom most rows?

... This and other answers work fine when you're working on smaller tables. I don't think it's worth ordering the entire table by a column when you are just interested in the bottom few rows. – steadyfish Oct 13 '14 at 16:09 ...
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Setting Authorization Header of HttpClient

...ent = new HttpClient()) { client.DefaultRequestHeaders.Authorization = _username.ToAuthHeaderValue(_password); } Again I think 2 above options make the client using statement a bit less repetitive. Keep in mind that it's best practice to reuse the HttpClient if you are making multiple http ca...
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Does Java read integers in little endian or big endian?

...you are unlikely to have ever encountered it as Intel, Motorola, and Zilog all agreed on the shift direction of their UART chips and that MSB of a byte would be 2**7 and LSB would be 2**0 in their CPUs (I used the FORTRAN power notation to emphasize how old this stuff is :) ). I ran into this issue ...
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Modify UIImage renderingMode from a storyboard/xib file

...er it's used rather than just in one interface builder file, but in almost all cases (that I've encountered) this is the behavior you want. A few things to note: The image color will not appear to have changed in interface builder (as of Xcode 6.1.1) but will work when the application is run. I...
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Rotate axis text in python matplotlib

... Call this after plotting. Ie, first ax.plot(...) then plt.xticks(rotation=90) – CGFoX Mar 1 at 16:25 ...